After registering to use the site users can create a user profile add other users as \""friends\"" exchange messages post status updates and photos share videos and receive notifications when others update their profiles. Additionally users may join common-interest user groups organized by workplace school or college or other characteristics and categorize their friends into lists such as \""People From Work\"" or \""Close Friends\"". Facebook had over 1.3 billion active users as of June 2014.[2] Due to the large volume of data collected about users the service's privacy policies have faced scrutiny among other criticisms. Facebook Inc. held its initial public offering in February 2012 and began selling stock to the public three months later reaching a peak market capitalization of $104 billion.